硫代硫酸盐法浸出废旧IC芯片中金的试验研究.pdf

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化工进展
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2015年第34卷第3期
研究开发
硫代硫酸盐法浸岀废旧IC芯片中金的试验研究
陈立乐,王景伟,白建峰,王鹏程2,赵新2
上海第二工业大学电子废弃物资源化产学研合作开发中心,上海201209;2中国电器科学研究院有限公司,
广东广州510275)
摘要:介绍了当前电子废弃物中常用的漫金方法及其优缺点,分析了电子废弃物中硫代硫酸盐法浸金的研究现
状。针对这一研究现状,本文采用碱性Na2S2O3溶液中添加Cu2'的方法,对废旧IC( integrated circuit)芯片中
金的浸出进行了试验研究。通过对IC样品进行机械预处理、粒度分析、解离度分析、化学预处理和漫金试验,
探讨了Na2S2O3浓度、Cu浓度、NH浓度、漫出温度、漫出时间和反应液固比6个因素对金浸出率的影响。试
验得出最佳浸金条件为:Na2S_O2浓度0.3molL,Cu2浓度0.03molL,NH浓度0.5molL,添加35g/L的Na2SO
作为稳定剂,漫取温度50℃,漫取时间2.5h,液固比10:1,在最佳漫出条件下,金的最高漫出率为92.25%
与传统方法相比,该方法具有漫出速度快、漫出液无毒、操作简单等优点,是一种具有开发潜力的电子废弃物
浸金方法。
关键词:粉碎;分离;硫代硫酸钠;废旧芯片;回收;漫金
中图分类号:X750文献标志码:A文章编号:1000-6613(2015)03-0884-07
DOl:10.16085/ ].issn.10006613.2015.03.046
Experimental study of gold leaching from waste rc with thiosulfate
CHEN Lile WANG Jingwei, BAI Jianfeng, WANG Pengcheng, ZHAO Xin
("Cooperative Centre for WEEE Recycling, Shanghai Second Polytechnic University, Shanghai 201209, China; China
Electric Apparatus Research Institute Co, Ltd. Guangzhou 510275, Guangdong, China)
Abstract: This paper described the current commonly e-waste gold leaching methods, their advantages
and disadvantages, and analyzed research status of e-waste thiosulfate gold leaching. Gold leaching
rom waste integrated circuit(IC)using the alkaline sodium thiosulfate solution with copper iron was
investigated. Through the mechanical pretreatment, particle size analysis, dissociate-ion analysis
chemical pretreatment and gold leaching experiments, the effects on gold leaching rate of Na2s2o;
concentration, Cu concentration, NH, concentration, temperature, leaching time and liquid to solid
ratio were discussed, and optimum gold leaching conditions were obtained: 0.3mo1l of Na2 S202
0.03mol/ of Cu*, 0. 5mol/L of NH 3.5/ of Na2$O3 as the stabilizer, leaching temperature of 50
C, leaching time of 2. 5h, liquid to solid ratio of 10: 1. Under these conditions, the highest rate of gold
leaching was 92. 25%. Compared with traditional methods, the new method had advantages of fast
leaching speed, non-toxic leachate and easy operation
Key words: crushing; separation; sodium thiosulfate; waste integrated circuit; recovery; gold leaching
收稿日期:2014-08-19;修改稿日期:2014-09-16
第一作者:陈立乐(1988-),男,硕土研究生,研究方向为电子废弃
基金项目:上海市教委创新重点项目(12Z2194)、国家自然科学基金物资源化。E- mail lilech@aium,com。联系人:王景伟,教授,研究
(21307080)、广东省战略新兴产业项目(2012A032300017)及校重方向为电子废弃物资源化。E-mailjwwang@sspu.edu.cn
点学科建设项目( XXKYS1404)。